Ben Kietzman created ARROW-11928:
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Summary: [C++][Compute] Add ExecNode hierarchy
Key: ARROW-11928
URL: https://issues.apache.org/jira/browse/ARROW-11928
Project: Apache Arrow
Issue Type: Improvement
Components: C++
Affects Versions: 3.0.0
Reporter: Ben Kietzman
Assignee: Ben Kietzman
Fix For: 4.0.0
Per discussion on
https://docs.google.com/document/d/1AyTdLU-RxA-Gsb9EsYnrQrmqPMOYMfPlWwxRi1Is1tQ
Add an ExecNode interface with which a streaming execution graph can be
constructed. Initial concrete classes will include:
- ScanNode, which wraps a dataset and is a pure emitter of batches.
- FilterNode, which evaluates an expression on inputs and based on the result
removes rows from batches (eventually, this may defer materialization of the
selection to other kernels. See ARROW-5005 ARROW-10474)
- ProjectNode, which evaluates expressions on inputs producing new columns.
- GroupedAggregateNode, which computes aggregations grouped on one or more keys.
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